|QUEST||In Service of Yalahar Quest|
(the item can be purchased from NPCs regardless of quest completion status)
Admittedly, Jug of Embalming Fluid is part of the In Service of Yalahar Quest, but you can just buy it from an NPC Mehkesh, also known as a potion seller in the ancient city of the pyramids.
Moreover, it doesn’t matter if you haven’t started this quest yet, if you’re in the middle of it, or if you’ve already finished In Service of Yalahar long ago. You can buy this jug regardless of the quest’s status.